Check the size printed on the tyre sidewall and compare it with your vehicle handbook or the tyre information sticker (often in the driver door shut or fuel flap). If your car uses the same size on all four wheels, all tyres should read 155/70 R13. Some vehicles have different front and rear sizes, so confirm both axles before ordering.
Match the load index and speed symbol already fitted, or choose a higher rating if you want extra margin. For 155/70 R13, common ratings include combinations such as 75T, but the correct one depends on the vehicle specification. Avoid fitting a lower rating than recommended, as it may be unsafe and could invalidate insurance.
Changing away from 155/70 R13 can alter rolling circumference, ground clearance and speedometer accuracy, and it may cause rubbing on full lock. Any change should follow a manufacturer-approved alternative size for your specific model and wheel width. If you are unsure, stick with 155/70 R13 to keep the car driving as intended.
All-season 155/70 R13 tyres can suit typical UK driving where conditions vary between wet, cold mornings and mild afternoons, especially for shorter trips around town. Look for options carrying the 3PMSF marking if you want extra assurance in winter conditions. If you regularly drive in heavy snow or rural areas, a dedicated winter tyre in 155/70 R13 may be the better option for that season.
Replace them when tread is at or near the 1.6 mm legal limit, or earlier if grip is dropping in wet weather, there is sidewall damage, or wear is uneven. Many drivers choose to replace around 3 mm for more confidence in the rain. For stability, fit the same tyres across an axle and replace in pairs, with the newest tyres usually fitted to the rear unless your vehicle manufacturer advises otherwise.
